Rock crusher having contained rock screening and cooperating grate means



D. FOGLE G CONTAINED ROCK SCREENING AND COOPERATING GRATE MEANS Filed Nov. 19, 1951 Dec. 1, 1953 F.

ROCK CRUSHER HAVIN I L INVENTOR.

54/7/62 59/6 Y warm? Patented Dec. 1, 1953 ROCK'CRUSHER HAVING CONTAINED ROCK" SCREENING AND CGOPERATING GRATE MEANS FrankD. Fogle, Ottawa, Kans ApplicationNovember 19, 1951, SeriaI'VNo. 257,029.

This invention relatesv to rock crushers, the primary'object-being to improve upon my U. S. Letters Patent No. 1555;879; dated June 5, 1951, and entitled- Rock Grusher Having Contained Rock Screening and Redirection Means.

The most important object of this invention is to provide a rock crusherof the kind disclosed in mysaid patenthaving arcuate grates underlying the rotatablecrnshersand disposed tocoopcrate with the rock screening-means thereof to more effectively produce rock of' uniform, predetermined size;

Another important object of the present invention is to providegrate means as aforesaid capable of improving the rock crusher of'my patent to the extent of making it possibl'eto more effec tively produce construction materials or many different sizes and grades.

Many more minor objects will be made clear or become apparent'during the course of the following specification, reference being had to the accompanying drawings, wherein:

Figure 1' is a vertical, substantially central cross-sectional view of a rock crusher made in accordance with my present invention; and

Fig. 2 is a cross-sectional1 view taken on line IIII of Fig. 1.

In the drawings, the numeral iii designates broadly a hollow chamber open at its. bottom and provided with a pair of' side walls 2, a pair of inclined side walls is, end walls it and a closed top 18.

An inlet opening it; is-closeo, by a plurality of chains 22. A pair of. shafts 2's and as extend transverseiy across the chamber Iii between the walls it thereofin substantially parallel relationship. These shafts 28 and 3%} are rotatably mounted within bearings 3-2 and 3st, in turn mounted exteriorlyof the: chamber is: and at tached. to. the walls i? of chamber it. Each of the. hammer mills broadly designated by the numerals. 3t: and 38' have, in addition to. the shats- 23' and" as a part thereof, a plurality of. spaced-apart discs so. The discs it are. rigidly secured to the respective shafts 23. and Si! and are provided with a number of spacers thelebetween designated by the. numeral s2... A number of hammers t t are journaled for free swinging movement upon; a. shaft 33 extending through.- openings pro-vided in the discs 4.53 disposed outwardly from. the; respective shafts'it and; seand the spacers 42..

Shafts 28 and 3b are each provided with one or more sheaves :38 mounted exteriorly of the chamber iii and having connection with a suit able source of power (not shown).

1: Claim; (Cl. 241-80.)

Rock directed intothe opening 26; falls by gravity upon the rotat-v ing hammer mills 35 and 38 and. crushing ac.

tion takes place as the hammers it: of. each of;

the mills 3t and 33 come into contact therewith.

Such rock particles as come into contact with. the top lsof chamber it will be further brokeninto smaller particles by a plurality of. side-byside T-shaped rails 52.

I 8 between angled. walls i l thereof.

Much of the material which ismoved upwardly by the mills stand. will be-ciirected at an an each constitute a plurality of beams to and a number of smaller beams 5-2. The beams 5i} and 62 extend entirely across the side walls [tor the chamber iii and are in spaced-apart relationship. Each of the-beams 5i) and 52 passes through openings provided'intheend walls 56 of chamber It and are held against displacement by a transverse pin passing therethrough exteriorly of the proximal end wall it.

The rows, 58 of beams 69 and 62 are spaced fromtheinnermost face of the walls is and extend from a point immediately below the rails 52 to a point above the mills 36 and 38. The distance. between the rails 52- governs the size of crushed rock which will pass from the chamber 1 ll, such particles of-rocs; as will not pass through the openings between beams til-falling back upon the hammers. it. of" mills t5. and 35 for further crushing andv projecting upwardlyuntll the same will pass. through such openings. After the crushed partioies of rockpass through the openings between beams satire-same will fall downwardly by gravity. between the beams tit and the proximal, side wall it. The precise inclination shown for the rows" 511 of beams ti and will cause, such rock particles" tov roll downwardly without returning toward the center of the chamber it... After these particles. reach the smaller beams, 52,.those particles of desired size will fall between rails 62,. Other. rock. particles will continue toroll, downwardly along the innermost face of therows 5.8. andbe, deposited upon a. screening assembly broadly designated by, the numeral 6.4. There. is a screening assembly 6 3' underlying each of the rows 58.

A number of bafile plates are triangular in shape and disposed in side-by-side relationship the chamber it through.

ilrlese rails 5'2 are dis. posed in transverse relationshipto the shafts 28. and 3b and extend entirely across the chamber The triangular shape of the baffles 66 forming the assembly 64, presents an inclined uppermost surface and those particles of rock which will not pass between plates 66 will gravitate downwardly and be picked up by the hammers 44 of the mills 36 and 38 and either be crushed to a suitable size at the point of impact or be thrown upwardly against the beams 62 or into the center of crushing action within the chamber l9.

Also disposed within the chamber I0 is screening means 58. This screen 88 constitutes a pair of spaced-apart beams 70 interposed between the outermost path of travel of the hammers 44 and the rows 58 of beams 60 and 62. The rock being crushed and repeatedly falling upon the rotating hammers 44 and falling upon the uppermost face of the beams 68 will be directed into the hammer mills 36 and 38 for re-crushing. The beams 1'9 are mounted in substantially the same manner as are beams 60 and 62 and are coextensive in length with the rows of beams 58. It is also notable that much of the rock rolling from the top of the screens 68 and into the hammer mills 36 and 38 will be directed against the lowermost surfaces of the beams I0 for further crushing.

In accordance with the present invention, there is provided an arcuate, substantially semicircular grate 12 for each crushing means 36-38 respectively, each grate consituting a plurality of spaced, elongated bars 14. The uppermost bars '14 are in supporting relationship to corresponding screening apparatus 64, and it is noted that the inclination of the uppermost faces of apparatus 64 has been altered from that shown in my patent to the end that the screening means 64 effectively cooperate with grates 12.

It is preferred that bars 14 extend through the end walls [6 and be keyed or otherwise held in place for ready removal and/or replacement. Their longitudinal axes are horizontal and their transverse axes within planes extending radially through axes of rotation of corresponding crushers 36 and 38. Thus, proximal bars 14 converge as hammers 44 are approached, eliminating wedging of rock between bars '14. Both grates 12 are spaced from side walls 12, permitting some of the rock falling through the screening means 64 to gravitate through the open bottom of chamber 10. Larger rock will slide along the upper inclined edges of plates 66 toward grates 12 within the paths of travel of hammers 44 that are relatively close to grates 12 when extended as shown in the drawings.

One crusher 36 or 38 may be driven clockwise or anti-clockwise, while the other crusher remains stationary, to produce rip-rap or large A And, crusher 36 may be driven clockwise and crusher 38 anti-clockwise, or vlce-versa, simultaneously, to produce relatively fine sized rock.

Finally, depending on the nature of the rock being crushed and other conditions, the speeds of rotation of the crushers may be varied to produce difiering sizes of construction materials. Suchwide variance in the nature of the finished product is made possible through the cooperation of the grates 12 with the screening means 64 and the hammers 44 that are freely swingable on their respective ins 46.

Manifestly, many changes and modifications may be made in the rock crusher above described and herein illustrated without departing from the spirit of this invention or scope of the appended claim.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

In a rock crusher having structure including a top wall, a pair of spaced side walls and a pair of spaced end walls and forming an open bottom, hollow chamber provided with an inlet opening. there being a pair of spaced, rotatable rock crushing means in the chamber below the inlet opening adapted to project the rock upwardh and laterally to the top and both side walls of said structure, the improvement of which comprises the combination of screening apparatus including a plurality of spaced-apart, vertical plates mounted on each side wall respectively above the axes of rotation of said crushing means and having the uppermost edges thereof inclined downwardly and inwardly toward said axes of rotation for directing toward said crushing means oversize rock rejected by said inclined edges of the plates; and a grate underlying each crushing means respectively, said grates being spaced apart and extending downwardly and inwardiy from the inward and lower portion of a corresponding screening apparatus toward each otherin spaced relationship to the proximal side wall for receiving a portion of the rock from said screening apparatus, each grate including a plumay of spaced, elongated bars interconnecting said end walls with their longitudinal horizontal and parallel with the axes of rotation of said crushing means, the bars of each grate bein':

arranged in an arcuate row concentric with the axis of rotation of the corresponding crushing means, the bars being disposed with their transverse axes in a plane extending radially through the axes of rotation of corresponding crushing means.

FRANK D. FOGLE.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 811,671 Simpson Feb. 6, 1906 1,331,969 Tomlinson Feb. 24, 1920 1,647,183 Leggemann Nov. 1, 1927 2,149,571 Battey Mar. '7, 1939 2,411,302 Stine Nov. 19, 1946 2,440,388 Wright Apr. 27, 1948 2,555,879 Fogle June 5, 1951 FOREIGN PATENTS Number Country Date 238,117 Great Britain Aug. 13, 1925 67,576 Denmark Sept. 6, 1948 

